Hi there! I second Rocio's note above. Your motivation and efforts during a time of uncertainty is really inspiring. Hopefully the below helps.
Grad Schools. You can look up the program or school to see if admissions is "DACA-friendly" before applying.
DACA Program. Because DACA is a form of temporary relief, if you want to go to grad/med school and eventually practice/work in the U.S., your long-term goal would be to obtain permanent resident status (aka a green card) after your mother becomes a U.S. citizen. Because this processes will take some time, remember to file the renewal of DACA well before the current expiration (assuming the process does not change). As of right now, previous DACA recipients may file for renewal of DACA. The earliest you can file for renewal of DACA is 120 days before the current expiration. Because immigration laws and requirements often change, please be sure to seek an attorney's advice or assistance with the renewal application or if you have any questions. There are many free legal clinics / services within each community to assist and advise on DACA renewals. If you need help with finding one when the time comes, please feel free to reach out.